GHSA-r9jw-mwhq-wp62

Source

https://github.com/advisories/GHSA-r9jw-mwhq-wp62

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/05/GHSA-r9jw-mwhq-wp62/GHSA-r9jw-mwhq-wp62.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-r9jw-mwhq-wp62

Aliases

Published

2022-05-13T01:42:19Z

Modified

2024-12-05T05:30:36.784778Z

Severity

7.5 (High) CVSS_V3 - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS Calculator

Summary

PyJWT vulnerable to key confusion attacks

Details

In PyJWT 1.5.0 and below the invalid_strings check in HMACAlgorithm.prepare_key does not account for all PEM encoded public keys. Specifically, the PKCS1 PEM encoded format would be allowed because it is prefaced with the string -----BEGIN RSA PUBLIC KEY----- which is not accounted for. This enables symmetric/asymmetric key confusion attacks against users using the PKCS1 PEM encoded public keys, which would allow an attacker to craft JWTs from scratch.

Database specific

{
    "nvd_published_at": "2017-08-24T16:29:00Z",
    "github_reviewed_at": "2022-09-12T14:50:37Z",
    "cwe_ids": [],
    "severity": "HIGH",
    "github_reviewed": true
}

References

Affected packages

PyPI / pyjwt

Package

Name: pyjwt; View open source insights on deps.dev
Purl: pkg:pypi/pyjwt

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

1.5.1

Affected versions

0.*

0.1.1

0.1.2

0.1.3

0.1.4

0.1.5

0.1.6

0.1.7

0.1.8

0.1.9

0.2.0

0.2.1

0.2.3

0.3.0

0.3.1

0.3.2

0.4.0

0.4.1

0.4.2

0.4.3

1.*

1.0.0

1.0.1

1.1.0

1.3.0

1.4.0

1.4.1

1.4.2

1.5.0